Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
We realized a planar multireflection glass system to investigate the localized surface plasmon resonance (LSPR) of gold nanoparticles. These nanospheres were realized in situ using an original and simple chemical growth method that is described. We were able to observe resonance phenomena as reflected by variations in…
A novel method for preparing poly(propylene-graft-2-methacrylic acid 3-(bis-carboxymethylamino)-2-hydroxy-propyl ester)-silver fibers (PPG-IAg fibers) by plasma-induced grafting polymerization is presented in this study. The chelating groups, -N(CH2COO-)2 (GMA-IDA), on the surface of the PPG-I fibers are the coordinat…
In this work, we propose a combined photochemical?chemical method that enables us to grow CdS nanoparticles with ?ngstr?m precision. CdS nanoparticles were formed through a photo-induced reaction between CdSO4 and Na2S2O3. Thioglycerol (C3H8O2S) was used as the capping agent. Fine tuning of the size was subsequently c…
A series of ethylene-containing mesoporous organosilica materials were fabricated via surfactant-mediated assembly of 1,2-bis(triethoxysilyl)ethylene (BTEE) organosilica precursor using alkyltrimethylammonium bromide (CnTAB) surfactants with different alkyl chain length (n=12, 14, 16, 18) as supramolecular templates.…
Co 2 Y‐type hexaferrites (Ba 2 Cu x Co 2− x Fe 12 O 22 , x =0,1) have been fabricated by the conventional ceramic process. The complex permittivity and permeability of Co 2 Y hexaferrite composites have been measured using a vector network analyzer in the frequency range of 2–18 GHz. The results show that Co 2 Y hexaf…
Here, we consider in detail the problem of the shape of the capillary meniscus around a charged colloidal particle, which is attached to a fluid interface: oil/water or air/water. The meniscus profile is influenced by the electric field created by charges at the particle/nonpolar fluid boundary. We digitized the coord…
Heterpolyacids (HPAs) demonstrate catalytic activity for oxidative and acid-catalyzed hydrocarbon conversion processes. Deactivation and thermal instability, however, have prevented their widespread use. Herein, ab initio density functional theory is used to study the thermal decomposition of the Keggin molecular HPA…
Lead zirconate titanate (PZT) ceramics were co‐fired with pure Ag powders at 1200°C for 1 h, and the ferroelectric and piezoelectric properties of the resultant PZT/Ag composites were evaluated, aimed at potential applications in functionally graded piezoelectric actuators with enhanced mechanical reliabilities. In th…
This study reports a novel approach, based on the method of laser induced pattern transfer, that can deposit patterned carbon nanotube (CNT) field emission cathodes on a variety of substrates at room temperature and in an ambient environment. Tests of emission characteristics of the fabricated cathodes present favoura…
Nanoscale globular platinum dendrites were synthesized by chemical reduction of platinum complexes with ascorbic acid in aqueous micellar solutions. The dendritic platinum nanostructures can be reproducibly prepared on a gram scale, allowing their characterization by N 2 adsorption as well as transmission electron mic…
The mechanisms of exciton dissociation and migration in the conjugated polymer (poly(2-methoxy-5-(2′-ethyl)(hexyloxy)1,4-phenylenevinylene))(MEH-PPV)/CdSe nanoparticle hybrid materials were investigated by steady-state and time-resolved photoluminescence spectroscopy. Rapid exciton dissociation at the nanoparticle/pol…
Amorphous silicon nitride is a model system for a covalently bound amorphous solid with a low atomic mobility where reasonable values of self-diffusivities are still lacking. We used neutron reflectometry on isotope enriched ${\mathrm{Si}}_{3}\text{ }^{14}\mathrm{N}_{4}/{\mathrm{Si}}_{3}\text{ }^{15}\mathrm{N}_{4}$ mu…
Grain growth behavior and solid‐state single crystal growth (SSCG) in the Pb(Mg 1/3 Nb 2/3 )O 3 –35 mol% PbTiO 3 (PMN–35PT) system have been investigated with varying Li 2 O/PbO ratios. The effect of dislocation density on crystal growth has also been studied. For SSCG, a BaTiO 3 single‐crystal seed was embedded in a…
We propose an algorithm to locate individual entanglements along chains, equilibrated using the bond-fluctuation lattice model. The algorithm identifies entanglements as local deviations of the primitive path from the shortest possible path between beads on a chain that are on lattice sites. For well-entangled chains…
The agglomeration of l -ornithine aspartate crystallized by the drowning-out method was investigated in a turbulent agitated semi-batch reactor. To modify the agglomeration conditions, the crystallization operating factors, including the agitation, feed flow rate, feed concentration, and drowning ratio (volume ratio o…
Unidirectional C/SiC composites were successfully prepared by hot pressing at 1850°C under 20 MPa, using different fiber volume fractions (from 28 vol% to 55 vol%) as reinforcement. The densification process of the composites became increasingly difficult with increasing fiber volume fraction, and some small pores wer…
The mesoscopic morphologies of linear and graft fluorinated block copolymers of ABCBA and C:BA types, respectively, have been investigated by using dissipative particle dynamics method. Self-assembly in a selective solvent has been examined by the introduction of dimethylformamide as the choice of solvent. By comparin…
We report matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS) and off-line coupling of size-exclusion chromatography with MALDI-TOFMS analysis (SEC/MALDI-TOFMS) methods for the detailed characterization of poly[(R,S)-3-hydroxybutyrate-co-L-lactic acid], P[(R,S)-3HB-co-LA], and po…
We present ab initio full-potential density functional calculations of the electronic structure of ${\mathrm{Ti}}_{0.0625}{\mathrm{Zn}}_{0.9375}\mathrm{O}$. We show that it is likely for Ti to order ferromagnetically in $\mathrm{ZnO}$, forming a dilute magnetic semiconductor, in agreement with experiment. The ferromag…
This paper addresses the damage and fracture issues of glass and ceramic materials used in solid oxide fuel cells. Analyses of an internal crack and of an interface crack between dissimilar materials were conducted using a modified boundary layer modeling approach. In this approach, fracture is allowed to occur in a s…